... company has the independent product design and development capability and the powerful technical support system and complete quality control and quality guarantee system. We ... pass the German TUV - ISO9001: 2000 quality system certification and international ISO9002 quality system certification; in 2002, our company ... PL,SW,SO,LWN,8 figures,TH,LJ,ORIFICE and non-standard.2)Material:Gr1,Gr2,Gr3,Gr5,etc ...